High school students participate in a free paddle night organized by the Anacostia Watershed Society near Kenilworth Park in Washington, D.C., on Sept. 23, 2014. The students are part of the Green Team program through Groundwork Anacostia. (Photo by Will Parson/Chesapeake Bay Program). (Download on Flickr)

High schoolers participate in a free paddle night organized by the Anacostia Watershed Society near Kenilworth Park in Washington, D.C., on Sept. 23, 2014. (Photo by Will Parson/Chesapeake Bay Program). (Download on Flickr)

High schooler students participate in a free paddle night organized by the Anacostia Watershed Society near Kenilworth Park in Washington, D.C., on Sept. 23, 2014. The students are part of the Green Team program through Groundwork Anacostia. (Photo by Will Parson/Chesapeake Bay Program). (Download on Flickr)

Egrets congregate just before sunset on the Anacostia River in Washington, D.C., on Sept. 23, 2014. Many of the birds migrate from the Amazon Basin in South America, while others come from Florida and the Caribbean to spend their summers in Washington. The area is part of the 9-mile Anacostia Water Trail, which features natural areas as well as riverfront recreation and ends where the Anacostia meets the Potomac River. (Photo by Will Parson/Chesapeake Bay Program). (Download on Flickr)

The Pepco Benning Road Power Plant rises above the Anacostia River during a free paddle night organized by the Anacostia Watershed Society on Sept. 23, 2014. The plant was decommissioned in 2012 and is slated for demolition. (Photo by Will Parson/Chesapeake Bay Program). (Download on Flickr)

Paddlers return to Kenilworth Park in Washington, D.C., at the end of a paddle night organized by the Anacostia Watershed Society on Sept. 23, 2014. (Photo by Will Parson/Chesapeake Bay Program). (Download on Flickr)

High schoolers, from left, Brian Brown, Dakoda DaCosta and Isaiah Thomas participate in a free paddle night organized by the Anacostia Watershed Society near Kenilworth Park in Washington, D.C., on Sept. 23, 2014. The boys are part of the Green Team program through Groundwork Anacostia. (Photo by Will Parson/Chesapeake Bay Program). (Download on Flickr)

Dominique Skinner from Groundwork Anacostia leads a group of Green Team high schoolers during a free paddle night organized by the Anacostia Watershed Society in Washington, D.C., on Sept. 23, 2014. (Photo by Will Parson/Chesapeake Bay Program). (Download on Flickr)

An egret lands in Kenilworth Marsh in Washington, D.C., on Sept. 23, 2014. The area is part of the 9-mile Anacostia Water Trail, which features natural areas as well as riverfront recreation and ends where the Anacostia meets the Potomac River. (Photo by Will Parson/Chesapeake Bay Program). (Download on Flickr)

Egrets wade through shallow water in Kenilworth Marsh in Washington, D.C., on Sept. 23, 2014. The area is part of the 9-mile Anacostia Water Trail, which features natural areas as well as riverfront recreation and ends where the Anacostia meets the Potomac River. (Photo by Will Parson/Chesapeake Bay Program). (Download on Flickr)